Use: {{Hexadecimal|x}} where x is the decimal number to be converted to a hexadecimal. Decimals and fractions will be rounded down. The number is, by default, formatted with a final subscript 16 to display the base. An optional second parameter of |hex will replace the base with "hex".

To opt out of the subscript, use a second parameter of |no (or equivalently |none), which also forces the display of at least two hexadecimal digits (instead of just one for values lower than 16).

To show a single digit, without the subscript and without the 0 prefix, set the second parameter to |digit.